Standard updates often patch the handshake protocols between the camera and the iSmart DV or companion smartphone apps.
Updating to specific versions (such as the V6 update) lets you use your action camera as a high-definition USB desktop webcam. apeman a77 firmware update
If you have contacted APEMAN support and they have sent you a file, here is the standard procedure for the A77. Standard updates often patch the handshake protocols between